Hugh stewart



WU [weaves Inventor gotten, t sires s t r; 1tt ffi re HUGH: STEWART, OF. GLlNTON, MASSACHUSETTS, ASSIGNOR T0 GEQRGE F. WRIGHT AND WILLIAM ORR, JR, or SAME PLACE.

Letters Patent No. 77,123, dateoZAm-il 21, 1868.

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TO ALL WHOM IT MAYGONGERN:

Be it known that' l, HUGH SThwART,-of Clinton, in the county of Worcester, in the State of Massachusetts, have invented new and useful Improvements in Dividers or Compasses, whereby they csnbe used'notenly for dividers, but also for inside and outside eolipers; and I do hereby declare that the foliowihg is full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of referonco marked thereon. l i I The present inventionreieto's tocertuiir n'ew meme-s11 'improvmentsin the *poiuts'ot" divider's, whereby they are notonly niade adjustable to each other, but also, by reversing the points, may be used'for ascertaining the exact diameter of holes, and of shui'ts, or any turned work which requires the use of either inside or outside may be subjected to.

nieces of the thumb-screws b- 6,fig. 1..

calipers. I v I v The ordinary'dividcrs used for ineehsniool purposesjore so. insde that should either imint be broken, the other sould have to be ground off to equalize them, thus, in. a 'short'time, rendering them unfit for service. Sometimes two dividers are wanted that may be used with oric point longer than the other; for instance, in

measuring, dividing, or striking a, circle upon work which has difie'rent elevations, the common dividers cannot be used without great diflic'ulty, if zit all, but byth ese improved dividers it is-ev-ident thot ail'thesc diificultics will be overcome. a I I v 'lo enable others skilled in the art to make and use my invention, I will proceed todescrib'e-its construction and operation.

Figure 1- is a view of the ordinary dividers cut'ofl' utsome distance from the point, so that there may be metal enough left around the hole to be of sufioient strehgth to receive the points and sustain the-strain they The dotted lines, a a, represent the holes drilled in the dividers to receive the adjustable points.

may be used either for dividers ori calipers, simply Evy reversing the points, and fixing them in position by Hcviugthnsdescribednay-invention, what I eioim, and desire to secure byIietter-sPatent, is- The combination, in one instrument, of dividers sud. inside-curl outside calipers, by'use of itho adjustable combination-points, used in. the manner-and for the purpose herein described and set forth.

HUGH: STEWART. Witnesses F. W. PARKHURST;

H. WATERS.

Figure 2 represents the adjustable oombinati'onspoints, which are made of steel, and so shaped that they. 

